30 BYZANTINE CHURCHES CHAP. on figure sculpture was considerably relaxed. Little figures are introduced in the cornices of the eikon frames in the Diaconissa (p. 186), and both in the parecclesion and the outer narthex of the Chora are found many small busts of angeis? saints, and warriors carved with great delicacy. The carving in the Chora is the finest work of the kind excepting that in S. Sophia. Capitals.—The development of the capital from the Roman form, which was suitable only for the lintel, to the impost capital shaped to receive an arch has been well explained by Lethaby and Swainson. According to these authors Byzantine capitals exhibit seven types. L The Impost capital.—It is found in SS. Sergius and Bacchus, the outer narthex of the Chora, the inner narthex of S. Andrew and elsewhere. A modification of this type is used in windows. It was employed throughout the style but especially in early times up to the sixth century, and again in the twelfth, thirteenth, and fourteenth centuries. II. The Melon type.—This is seen on the columns of the lower order in SS. Sergius and Bacchus and on the columns of the narthex of S. Theodore, where they have been taken from an older building. The melon capital was probably not in use after the sixth century. III. The Bowl capital.—This type is used in the great order of S. Sophia at Constantinople. It has been thought peculiar to this church, but the capitals from S, Stephen at Triglia in Bithynia resemble those of S. Sophia closely. Only the peculiar volutes of the S. Sophia capitals are absent.1 IV. The Byzantine or c Pseudo-Ionic/—This is found in the upper order of SS. Sergius and Bacchus, and in the narthex of S. Andrew. It is an early type, not used after the sixth century, and its occurrence in S. Andrew favours the early date assigned to that church. V. The Bird and Basket—Found in Constantinople, only in S. Sophia. VI. The Byzantine Corinthian.—This is the commonest 1 Hasluck, * Bithynica/ Annual B.S.A. XIII. 1906-7.